Jetting Help!!

[bob4558]

I just changed over from a 28mm round slide mik to a 28mm flat slide TM series carb.I was running a 235 main jet in the round slide so I put a 230 jet in my TM the engine just boged when I hit the fuel soo I jetted down to a 180 main still boggs any help?

[hotquads1]

I think you may have went the wrong direction on your jetting change, bogging is normally a sign of too lean , try going up several jet sizes .

[bob4558]

OK. IS ANY RUNNING A TM28 AND WHAT SIZE JETS?

[nastynotchback1]

you mean a 135main or is that 235 right?

[bob4558]

I WAS RUNNING A 235 IN THE ROUND SLIDE RAN GREAT!

[bob4558]

I FOUND MY PROBLEM MY FLOAT LEVEL WAS TO LOW!

[nastynotchback1]

Glad you got it fixed but i don't run jets that big in my highly built 450.

[bob4558]

It is high but that what the engine likes! I think the carb mite to big?

[jerkyboy]

Some of those carbs run diferent jets. And they go buy a different number scale.

[bob4558]

I will look into that thanks.

[nastynotchback1]

Originally posted by jerkyboy
Some of those carbs run diferent jets. And they go buy a different number scale.


AHHH i see.

[bob4558]

What for carb and jetting are you running?

[nastynotchback1]

Originally posted by bob4558
What for carb and jetting are you running?

28MM PWK With 155 main and 50 pilot on our 70cc

My 450 has a fcr 41mm and i think its 195 main

[bob4558]

Your running a Keihin carb! Mine is Mikuni 28mm. You like Keihin?

[nastynotchback1]

Originally posted by bob4558
Your running a Keihin carb! Mine is Mikuni 28mm. You like Keihin?

I like the pwk series.My next choice would be the stage6 pwk knock-off.I would stay away from the round slide Keihin.Never had any luck with those.